Pulmonology is the study of the and associated structures.
a. lungs
b. trachea
c. alveoli
d. sternum

  A. Lungs.

Explanation:

  Pulmonology is a medical specialty that deals with diseases involving the respiratory tract. It comes from the Greek and the world could be translated as the study of lungs.

  It is considered as a branch of internal medicine and is related to intensive care medicine.

  I hope this answer helps you.

answer:

i believe the answer is d).

explanation:

i think this is because you are tearing apart the muscle, and then when you eat, the muscle re-heals, making itself even stronger.

edit: i put b) before but i meant to put d). sorry for the incorrect answer.